GRB 120311B

Time: 15:08:10
Trigger Number: 517489
Burst Advocate: Frank Marshall

BAT Data:

RA: a	258.551 17:14:12.2
Dec: a	-13.068 -13:04:04.8
90% Error Radius: b	1.3
T90: c	28.2
Fluence: d	10 (1)
1s Peak Photon Flux: e	1.5 (0.2)
Photon Index: f	1.96, PL (0.14)

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90% error in parentheses,
^a J2000; ^b arcmin; ^c seconds; ^d 10^-7 erg/cm² (15-150 keV); ^e ph/cm²/sec (15-150 keV); ^f PL = simple power-law, CPL = cutoff power-law (15-150 keV)

BAT Light Curve:

XRT Data:

RA: a	17:14:14.91
Dec: a	-13:03:05.2
90% Error Radius: b	1.4
Time to First Observation: c	3067.73
Early Flux: d	n/a
11 Hour Flux: d	0.09016455
24 Hour Flux: d	0.05251977
Initial Temporal Index:	-0.6927
Spectral Index (Gamma):	2.00763
Column Density (NH): e	3.79306

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Note: Please be aware that only the very basic temporal and spectral quantities are reported here. You are strongly encouraged to see the referenced GCN circulars for full details.
^a J2000; ^b arcsec; ^c seconds; ^d 10^-11 erg/cm²/s (0.3-10 keV); ^e 10²¹ cm^-2

» XRT GRB Live Catalogue
» XRT Light Curves
» XRT Spectra

UVOT Data:

RA: a	n/a
Dec: a	n/a
90% Error Radius: b	n/a
Time to First Observation: c	3072
V Magnitude:	V>20.3
Other Filter Magnitudes:	B>20.7 U>19.7 UVW1>20.9 UVM2>20.8 UVW2>21.9 White>22.8

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^a J2000; ^b arcsec; ^c seconds

Comments:

Due to an observing constraint, Swift did not slew until T0+49.0 minutes.
UVOT: no detection

References:

BAT: GCN 13038; GCN 13041
XRT: GCN 13040; GCN 13042; GCN 13044; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13047
Radio:
Redshift:
Host:
Other: GCN Report 371.1